Summary
To get accurate click numbers in Demand Gen reporting, compare Google Ads DemandGen Clicks with GA4 Session data over the last 30 days. If discrepancies exist, create a Custom Column 'actual Clicks' using the formula 'Clicks * ratio'. Create another 'actual CPC' column using 'Cost / actual clicks'. This can also be applied to conversion rate and other metrics. This strategy was developed with James Deeney.